How To Sharpen Chain Saw Blade With File: Pro Tips & Tricks

Want to know how to sharpen a chainsaw chain with a file? Yes, you absolutely can sharpen a chainsaw blade with a file! In fact, it’s the preferred method for many professionals, allowing for precise control and on-the-job maintenance. This guide will walk you through every step, providing pro tips and tricks to keep your chainsaw cutting like new.

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Why Sharpen Your Chainsaw Chain?

A dull chainsaw is not only inefficient but also dangerous. It forces you to apply more pressure, which can lead to kickback and increase the risk of accidents. A sharp chain bites into the wood easily, making your work faster, safer, and less tiring. Regular maintaining chainsaw chain sharpness is key to its lifespan.

Benefits of Sharpening with a File

• Precision: Filing allows for greater control over the sharpening process, ensuring each tooth is sharpened to the correct angle.
• Portability: A chainsaw sharpening kit with files is compact and easy to carry, making it ideal for on-site maintenance.
• Cost-effectiveness: Filing is a relatively inexpensive way to maintain your chainsaw chain compared to professional sharpening services.
• Chain Longevity: Regular filing prevents excessive wear and tear, extending the life of your chain.

Gathering Your Tools: What You Need

Before you start, make sure you have the following tools:

• Round file: The correct chainsaw file size is essential. It must match the pitch of your chain (more on this later).
• Flat file: Used for filing the depth gauges (rakers).
• File holder (optional): Helps maintain consistent chainsaw sharpening angles.
• Depth gauge tool (raker gauge): Used to check and file the depth gauges.
• Vise or clamp: To securely hold the chainsaw bar.
• Gloves: For hand protection.
• Safety glasses: To protect your eyes from metal filings.
• Marking pen: To mark the starting tooth.

Choosing the Right Chainsaw File Size

Selecting the correct file size is vital for effective sharpening. The file size corresponds to the chain’s pitch – the distance between any three consecutive rivets divided by two.

Here’s a general guideline, but always check your chainsaw’s manual for the manufacturer’s recommendation:

Chain Pitch (inches)	Recommended File Size (inches)
0.325	5/32″ (4.0 mm)
3/8″ Low Profile	5/32″ (4.0 mm)
3/8″	7/32″ (5.5 mm)
0.404	13/64″ (5.2 mm)

Preparing Your Chainsaw

1. Safety First: Ensure the chainsaw is turned off and the spark plug is disconnected to prevent accidental starting.
2. Secure the Bar: Place the chainsaw bar in a vise or clamp it securely to a workbench. This will keep the chain stable while you’re filing.
3. Clean the Chain: Remove any dirt, debris, or sawdust from the chain using a brush or rag. A clean chain makes it easier to see the cutting edges and ensures a better filing result.
4. Mark a Starting Point: Use a marking pen to mark the first tooth you’ll sharpen. This helps you keep track and ensures you sharpen every tooth.

The Step-by-Step Chainsaw Tooth Filing Guide

Step 1: Determine the Correct Chainsaw Sharpening Angles

The chainsaw sharpening angles are crucial for optimal cutting performance. There are usually two angles to consider:

• Top Plate Angle: This is the angle of the top cutting edge of the tooth. It typically ranges from 55 to 60 degrees.
• Side Plate Angle: This is the angle of the side cutting edge of the tooth. It usually ranges from 10 to 15 degrees.

Many chainsaw sharpening tools and file holders have markings to help you maintain these angles. Your chainsaw’s manual should also specify the correct angles for your chain.

Step 2: Filing Chainsaw Teeth

1. Position the File: Place the round file on the first tooth, aligning it with the top and side plate angles. If you’re using a file holder, ensure it’s properly positioned on the tooth.
2. File with Consistent Pressure: Using smooth, even strokes, file the tooth from the inside out. Apply light to moderate pressure on the forward stroke and release pressure on the return stroke.
3. Maintain the Angle: It is very important to maintain consistent chainsaw sharpening angles. Follow the original shape of the tooth as you file. The file should only contact the cutting edges of the tooth.
4. Count Your Strokes: Keep track of the number of strokes you use on each tooth. This will help you sharpen each tooth evenly.
5. Repeat for All Teeth: Move to the next tooth and repeat the filing process. Work your way around the entire chain, using the same number of strokes on each tooth.
6. Sharpen Opposite Teeth: Once you’ve sharpened all the teeth on one side of the chain, loosen the vise and rotate the chainsaw to sharpen the teeth on the opposite side. Remember to file in the opposite direction.

Step 3: Checking for Even Sharpening

After sharpening all the teeth, compare the length of the cutters. They should all be roughly the same length. If some teeth are noticeably shorter, it means they were either more damaged or you used more strokes on them. Try to even them out as much as possible, but avoid over-filing.

Depth Gauge Filing (Raker Filing)

The depth gauges, or rakers, are the small projections in front of each cutting tooth. They control how deeply the tooth bites into the wood. After several sharpenings, the depth gauges may become too high, reducing the chain’s cutting efficiency.

Step 1: Checking the Depth Gauges

1. Use a Depth Gauge Tool: Place the depth gauge tool on the chain, ensuring it sits flush against the cutters.
2. Identify High Gauges: Look for any depth gauges that protrude above the tool. These are the ones that need filing.

Step 2: Filing the Depth Gauges

1. Position the Flat File: Place the flat file on top of the protruding depth gauge.
2. File Down Evenly: File the depth gauge down until it’s flush with the depth gauge tool. Be careful not to file too much.
3. Round the Front Edge: Use the flat file to slightly round the front edge of the depth gauge. This helps prevent the chain from grabbing or kicking back.
4. Repeat for All High Gauges: Repeat the filing process for all the depth gauges that protrude above the tool.

Pro Tips for Better Chainsaw Sharpening

• Use a File Guide: A chainsaw sharpening tool like a file guide can help you maintain consistent chainsaw sharpening angles and depth, especially if you’re a beginner.
• Clean Your Files Regularly: Metal filings can clog your files, making them less effective. Clean them with a wire brush.
• Don’t Overheat the Teeth: Filing too aggressively can generate heat, which can damage the steel in the teeth. Use light to moderate pressure and take your time.
• Keep Your Chain Properly Tensioned: A properly tensioned chain will stay in place better while you’re filing.
• Consider a Chainsaw Sharpening Kit: A chainsaw sharpening kit typically includes all the necessary tools, such as files, a file guide, and a depth gauge tool, in one convenient package.
• Inspect the Chain Regularly: Check for damaged or broken teeth, loose rivets, or other signs of wear. Replace the chain if necessary.
• Consult a Professional: If you’re unsure about any aspect of chainsaw sharpening, or if your chain is severely damaged, take it to a professional sharpening service.

Maintaining Your Sharpened Chainsaw

• Lubricate the Chain: Always use the correct chainsaw bar and chain oil to keep the chain lubricated. This reduces friction and wear.
• Clean the Chainsaw Regularly: Remove sawdust and debris from the chainsaw after each use.
• Store the Chainsaw Properly: Store the chainsaw in a dry place, away from direct sunlight and extreme temperatures.
• Check Chain Tension: Ensure proper chain tension before each use.

Grasping Different Types of Chainsaw Files

The best chainsaw file for you will depend on personal preference, chain type, and the tools you have. Here’s a quick breakdown:

• Round Files: Most common type, used for sharpening the cutting edges of the teeth. Come in various diameters to match different chain pitches.
• Flat Files: Used for filing down the depth gauges (rakers).
• File Guides: Help maintain correct filing angles and depth. Can be used with both round and flat files.
• Chainsaw Sharpeners: Electric or manual tools that automate the sharpening process. These can be faster but may not offer the same level of precision as hand filing.

Deciphering When to Replace Your Chain

Even with regular sharpening, a chainsaw chain will eventually need to be replaced. Here are some signs that it’s time for a new chain:

• Excessive Wear: The teeth are significantly worn down, even after sharpening.
• Broken or Missing Teeth: Damaged teeth can’t be effectively sharpened and will reduce cutting efficiency.
• Loose Rivets: Loose rivets can cause the chain to derail and are a safety hazard.
• Stretched Chain: If the chain is constantly becoming loose, even after adjusting the tension, it may be stretched beyond its limit.
• Difficulty Sharpening: If the chain is consistently difficult to sharpen, or if the teeth won’t hold an edge, it’s likely time for a replacement.

A Comprehensive Chainsaw Tooth Filing Guide Table

Component	Purpose	How to Maintain
Cutting Teeth	Cut through the wood fibers.	Sharpen regularly with a round file. Maintain correct angles and even strokes.
Depth Gauges (Rakers)	Control the depth of the cut.	File down with a flat file when they become too high. Round the front edge slightly.
Chain	Connects the cutting teeth and depth gauges, moves around bar.	Keep lubricated, tensioned, and clean. Replace when worn or damaged.
Bar	Supports and guides the chain.	Keep clean, lubricated, and free from burrs. Flip bar regularly for even wear.
Sprocket	Drives the chain.	Keep clean and lubricated. Replace when worn.

FAQ: Sharpening Your Chainsaw Chain

• What is the best chainsaw file? The best file depends on your chain’s pitch. Refer to the size chart provided above and your chainsaw manual.
• Can I use any file to sharpen my chainsaw? No. It’s crucial to use a round file of the correct size for your chain’s pitch and a flat file for the depth gauges.
• How often should I sharpen my chainsaw chain? Sharpen your chain whenever you notice a decrease in cutting performance or if the chain has hit dirt or rocks.
• What are chainsaw sharpening angles? These are the angles at which you file the cutting edges of the teeth. Maintaining the correct angles is crucial for optimal cutting performance.
• Is it better to sharpen my chainsaw chain myself or take it to a professional? Sharpening yourself is cost-effective and convenient for maintaining chain sharpness. However, if your chain is severely damaged or you’re uncomfortable with the process, a professional sharpening service is a good option.

Conclusion: Mastering Chainsaw Sharpening

Sharpening your chainsaw chain with a file is a valuable skill that can save you time, money, and effort. By following the steps outlined in this guide and practicing regularly, you can keep your chainsaw cutting like new and ensure safe and efficient operation. Remember to prioritize safety, use the correct tools, and maintain your chain properly for optimal results.